^You can use XLINK also to play online..but there is another software LEAF, it is much better than XLINK...But if you can play live without both these then why struggle to use them
And for JTAG its is a hack which can boot homebrew code in less than 5 seconds...Actually its a bit complicate to make someone understand what Jtag is.But with JTAG, you can unlock your 360 and can have full control over it. Allowing.
- Linux
- Homebrew
- Unsigned Code
- Use a Re-booter(Freeboot or XBReboot) :blah :blah